CN102158125A - Non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors - Google Patents
Non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors Download PDFInfo
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- CN102158125A CN102158125A CN2011100993561A CN201110099356A CN102158125A CN 102158125 A CN102158125 A CN 102158125A CN 2011100993561 A CN2011100993561 A CN 2011100993561A CN 201110099356 A CN201110099356 A CN 201110099356A CN 102158125 A CN102158125 A CN 102158125A
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- ultrasonic motor
- rotors
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Abstract
The invention discloses a non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors, belonging to the field of micromotors. The non-contact ultrasonic motor mainly comprises ball rotors, bowl type stators, annular piezoelectric ceramics, elastic cushions and supporting devices. When the piezoelectric ceramics are electrified with a specific alternating-current voltage in an ultrasonic frequency domain, the parts that the bowl type stators are matched with the ball rotors form travelling waves so as to induce travelling wave sound fields between the rotors and the stators. Acoustic radiation pressures in the travelling wave sound fields are utilized to suspend the ball rotors, thus the generated acoustic viscous forces are used to drive the rotors to rotate. The ultrasonic motor is the non-contact ultrasonic motor, is simple and compact in structure and low in cost, is easy to process and assemble and the like.
Description
Technical field
Bowl formula travelling-wave type ball rotor non-contact ultrasonic motor of the present invention belongs to the non-contact ultrasonic motor in the electrical micro-machine field.
Background technology
Ultrasound electric machine is to utilize the inverse piezoelectric effect of piezoelectric ceramic and the novel electrical micro-machine of ultrasonic vibration.Wherein bowl formula travelling-wave type ball rotor non-contact ultrasonic motor belongs to a kind of of travelling-wave type non-contact ultrasonic motor, adopting stator and rotor directly not to contact the mode that drives improves rotating speed and avoids frictional dissipation, be easy to realize the high rotating speed of motor, in aerospace field, non-contact type bearing transmission, the transmission of noncontact material etc., have broad application prospects.Present non-contact ultrasonic motor mostly is disk or cylindricity rotor, can not realize the noncontact transmission of ball bearing mechanism.The present invention proposes a kind of ball rotor non-contact ultrasonic motor, the capable wave sound field that the bowl-type vibration end face of employing stator excites drives the identical spherical spinner rotation of radius, not only realize high rotating speed easily, and this mechanism can be used for the high-speed spherical spinner electric rotating machine and the transmission of contactless ball bearing.
Summary of the invention
Purpose of the present invention just is to develop a kind of compact conformation, is easy to processing, assembling and uses, bowl formula traveling wave type ultrasonic motor that can noncontact mode drive ball rotor.
For achieving the above object, this bowl formula travelling-wave type ball rotor non-contact ultrasonic motor is made of spherical spinner, bowl formula stator, ring piezoelectric pottery, cushion and bracing or strutting arrangement.Wherein spherical spinner is positioned at a bowl formula stator cavity; The ring piezoelectric pottery is positioned at bowl lower surface of formula stator; The last section of cushion contacts with the lower surface of bowl formula stator; The upper surface of bracing or strutting arrangement contacts with the lower surface of cushion.The employing of described ring piezoelectric pottery waits the branch partitioned mode; Described bowl formula stator freely supports boundary condition by cushion for stator provides; Total is by the bracing or strutting arrangement support fixation.
The present invention compared with prior art, structure is compact more, processing and assembling all are easy to realize higher precision, are more convenient for simultaneously installing and using, and are particularly suitable for the transmission field of multivariant high-speed electric rotating machine and contactless ball bearing.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the polarization and the configuration mode figure of spherical piezoelectric ceramic among the present invention;
Fig. 3 is the FEM (finite element) model figure of bowl formula stator among the present invention;
Fig. 4 is a bowl formula stator A phase mode view among the present invention;
Fig. 5 is a bowl formula stator B phase mode view among the present invention;
Fig. 6 is that bowl formula stator vibration brings out the schematic diagram that sound field is used for suspending and drives rotor among the present invention.
Wherein: spherical spinner 1, bowl formula stator 2, ring piezoelectric pottery 3 and cushion 4 and bracing or strutting arrangement 5.
Embodiment
Below with reference to drawings and the specific embodiments structure of the present invention and operation principle are elaborated.
A kind of bowl of formula travelling-wave type ball rotor non-contact ultrasonic motor is characterized in that: comprise spherical spinner 1, bowl formula stator 2, ring piezoelectric pottery 3 and cushion 4 and bracing or strutting arrangement 5, wherein spherical spinner 2 is positioned at bowl formula stator 2 cavitys; Ring piezoelectric pottery 3 is positioned at bowl lower surface of formula stator 2; Cushion 4 is positioned at bowl lower surface of formula stator 2; Bracing or strutting arrangement 5 is positioned at the bottom surface of cushion 4.3 employings of described ring piezoelectric pottery wait the branch partitioned mode;
It is the bowl-type cavity that its stator drives end face, is used to drive the identical spherical spinner of radius;
Described bowl formula stator 2 is freely supported boundary condition for stator provides by cushion 4; Total is by bracing or strutting arrangement 5 support fixation.
As shown in Figure 1, the invention provides a kind of bowl of formula travelling-wave type ball rotor non-contact ultrasonic motor, comprise spherical spinner, bowl formula stator, ring piezoelectric pottery, cushion and bracing or strutting arrangement, below will introduce respectively.
The position that non-contact ultrasonic motor among the present invention utilizes the inverse piezoelectric effect of piezoelectric ceramic to excite bowl formula stator and spherical spinner to be complementary forms capable ripple, and then the air dielectric that brings out between the stator and rotor forms capable wave sound field, the acoustic radiation pressure of row wave sound field suspends the ball rotor, and the sound stickiness power of generation will promote rotor rotation.Therefore, stator and rotor basic driver principle can be summarized as solid-fluid-solid mode, as shown in Figure 5.For in bowl formula stator, producing the row ripple, the disconnected piezoelectric ceramic of pasting at its end, as shown in Figure 1.Fig. 2 can be divided into A, two groups of big subregions of B two-phase (quadrature on space phase), wherein every multi partition form that is mutually for the piezoelectric ceramic that motor stator uses.And the number of subregion is 4 times of wavelength number, if selected operation mode is 4 wavelength, then the ring piezoelectric pottery is divided into 16 subregions, and arc length and polarised direction are followed successively by:
+,
+,
-,
-,
+,
+,
-,
-,
+,
+,
-,
-,
+,
+,
-,
-, wherein the odd number subregion constitutes A phase polarized area, and the even number subregion constitutes B phase polarized area.
Piezoelectric ceramic piece after the polarization is subjected to electric field action can produce distortion, and the subregion that polarised direction is identical with direction of an electric field produces elongation strain, and the subregion that polarised direction is opposite with direction of an electric field produces compression.Since piezoelectric ceramic with stick on the stator bottom surface, therefore, when piezoelectric ceramic piece being applied the alternating electric field of two-phase quadrature time phase, just can make stator generation transverse bending vibration.When A passes to mutually
During (its frequency equals stator operation mode frequency) alternating voltage, stator will be inspired flexural resonance, as accompanying drawing 4(a) A phase operation mode shown in; When B pass to identical frequency mutually with A, with the width of cloth
During alternating voltage, stator produces another flexural resonance, as accompanying drawing 4(b) B phase operation mode shown in (with A phase space quadrature).If with these two voltages be added to respectively simultaneously A mutually with B mutually, so, synthesizing of these two mutually orthogonal flexural vibrations, stator just presents rotoflector mode, the stator upper surface forms capable ripple, rely on row wave sound field acoustic radiation pressure that the ball rotor is suspended, the sound viscous force of generation will promote rotor rotation, and follow the direction of wave travel high speed rotating.Especially, if produce reverse capable ripple, only need change or exchange input signal to get final product.
Above embodiment only for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought that proposes according to the present invention, and any change of being done on the technical scheme basis all falls within the protection range of the present invention.
Claims (3)
1. bowl formula travelling-wave type ball rotor non-contact ultrasonic motor is characterized in that: comprise spherical spinner, bowl formula stator, ring piezoelectric pottery and cushion and bracing or strutting arrangement, wherein spherical spinner is positioned at a bowl formula stator cavity; The ring piezoelectric pottery is positioned at bowl lower surface of formula stator; Cushion is positioned at bowl lower surface of formula stator; Bracing or strutting arrangement is positioned at the bottom surface of cushion.
2. bowl formula travelling-wave type ball rotor non-contact ultrasonic motor as claimed in claim 1, it is characterized in that: it is the bowl-type cavity that its stator drives end face, is used to drive the identical spherical spinner of radius.
3. bowl as claimed in claim 1 formula travelling-wave type ball rotor non-contact ultrasonic motor is characterized in that described ring piezoelectric pottery adopts the five equilibrium partitioned mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100993561A CN102158125A (en) | 2011-04-20 | 2011-04-20 | Non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100993561A CN102158125A (en) | 2011-04-20 | 2011-04-20 | Non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors |
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| CN2011100993561A Pending CN102158125A (en) | 2011-04-20 | 2011-04-20 | Non-contact ultrasonic motor of bowl-type traveling wave mode ball rotors |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103965A (en) * | 2013-01-30 | 2013-05-15 | 江苏武东机械有限公司 | Steel dam strobe |
| CN107612415A (en) * | 2017-10-30 | 2018-01-19 | 哈尔滨工业大学 | A kind of multiple degrees of freedom sandwich micro-containing operators and its displacement output control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101262186A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Vertical bending layer energy converter cylinder stator and ultrasonic electromotor using this stator |
| CN101572505A (en) * | 2009-03-16 | 2009-11-04 | 电子科技大学 | Rotary and linear dual-purpose ultrasonic motor |
| CN101976990A (en) * | 2010-10-25 | 2011-02-16 | 南京航空航天大学 | Near field ultrasonic suspension bearing system and electric excitation manner thereof |
-
2011
- 2011-04-20 CN CN2011100993561A patent/CN102158125A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101262186A (en) * | 2008-04-29 | 2008-09-10 | 哈尔滨工业大学 | Vertical bending layer energy converter cylinder stator and ultrasonic electromotor using this stator |
| CN101572505A (en) * | 2009-03-16 | 2009-11-04 | 电子科技大学 | Rotary and linear dual-purpose ultrasonic motor |
| CN101976990A (en) * | 2010-10-25 | 2011-02-16 | 南京航空航天大学 | Near field ultrasonic suspension bearing system and electric excitation manner thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103965A (en) * | 2013-01-30 | 2013-05-15 | 江苏武东机械有限公司 | Steel dam strobe |
| CN107612415A (en) * | 2017-10-30 | 2018-01-19 | 哈尔滨工业大学 | A kind of multiple degrees of freedom sandwich micro-containing operators and its displacement output control method |
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Application publication date: 20110817 |